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CNN Projection: Sanders wins West Virginia primary

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2. Massachusetts stabbings

A man stabs six people -- two fatally -- in two separate locations. He is killed by police, leaving us with that age-old question: why? Police say Arthur DaRosa went on his stabbing spree in Taunton, Massachusetts, after he was in a car wreck last night. He stabbed two people in a home, killing an elderly woman. He then took a car and crashed into a mall, where he later stabbed four more people -- killing a 56-year-old man -- at a restaurant. An off-duty cop ended the rampage by fatally shooting DaRosa.

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3. President Obama

The White House announced yesterday that President Obama will visit Hiroshima, Japan later this month. He'll become the first sitting American president to visit the site of the U.S. atomic bomb attack. It's part of Obama's "apology tour," conservative critics cried, but the White House said Obama won't "revisit" the decision to drop the bomb on the city at World War II's end.

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4. Brazil

Today's a big day in Brazilian politics. The Senate is set to vote on impeachment proceedings against President Dilma Rousseff. If the vote passes, she'll have to step down for up to six months while impeachment claims are investigated. Things aren't looking too hot on the Olympics front either. Ex-soccer star Rivaldo is warning everyone to stay away, saying Rio's too dangerous, after a teen girl was shot and killed over the weekend. And U.S. soccer star Hope Solo says she'll "begrudgingly" participate despite Zika fears.

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Why does Brazil want to impeach President Rousseff?

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5. NASA

Here's today's science lesson: An exoplanet is a planet that orbits a star other than our own Sun, and the Kepler telescope has found a ton of them. Kepler's discovered 1,284 planets, NASA said yesterday, the most exoplanets announced at one time. Are any of them habitable? Way too soon to determine that, but Kepler is focused on finding rocky planets in the habitable zone -- the planetary sweet spot where water (and this thing called life) could exist.